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Finding the Fourth Proportional to 919.44, 1,269.24 and 625.44

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Solution

The fourth proportional to 919.44, 1,269.24 and 625.44 is: 863.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.44 : 1,269.24 = 625.44 : x
  2. Step 2: Convert to fraction form
    919.44/1,269.24 = 625.44/x
  3. Step 3: Cross multiply
    919.44x = 1,269.24 × 625.44
  4. Step 4: Simplify right side
    919.44x = 793,833.47
  5. Step 5: Solve for x
    x = 793,833.47/919.44
  6. Step 6: Final answer
    x = 863.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.